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ICD-10 Guide
ICD-10 CodesO31.12

O31.12

Billable

Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/08/2025

Code Description

ICD-10 O31.12 is a billable code used to indicate a diagnosis of continuing pregnancy after spontaneous abortion of one fetus or more, second trimester.

Key Diagnostic Point:

O31.12 refers to the clinical scenario where a pregnancy continues after the spontaneous abortion of one or more fetuses during the second trimester. This condition is particularly relevant in multiple gestations, where the loss of one fetus can lead to various complications for the remaining fetus or fetuses. The risk of complications such as twin-to-twin transfusion syndrome (TTTS) is heightened in these cases. TTTS occurs when blood flow between twins is imbalanced, leading to one twin receiving too much blood (recipient) and the other too little (donor). This can result in significant morbidity for both twins, including heart failure, growth restriction, and even fetal demise. Monitoring and management of the remaining fetus or fetuses is crucial, and may involve specialized ultrasound assessments and potential interventions. The ongoing pregnancy must be carefully managed to ensure the health of the surviving fetus or fetuses, making this a complex and high-risk situation requiring close obstetric care.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Multiple gestation considerations
  • Potential for complications like TTTS
  • Need for specialized monitoring and interventions
  • Variability in clinical outcomes based on gestational age

Audit Risk Factors

  • Inadequate documentation of spontaneous abortion
  • Failure to document complications related to multiple gestation
  • Misclassification of gestational age
  • Lack of follow-up documentation for ongoing pregnancy

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed records of spontaneous abortion, ongoing pregnancy assessments, and any complications.

Common Clinical Scenarios

Management of a patient with a history of spontaneous abortion in a multiple gestation pregnancy.

Billing Considerations

Accurate tracking of fetal development and complications is essential for proper coding.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive documentation of high-risk factors, ultrasound findings, and management plans.

Common Clinical Scenarios

Monitoring a twin pregnancy where one twin has been lost due to spontaneous abortion.

Billing Considerations

Focus on the implications of TTTS and other complications that may arise.

Coding Guidelines

Inclusion Criteria

Use O31.12 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the spontaneous abortion and ongoing pregnancy
  • Specific criteria for multiple gestations and complications must be adhered to

Exclusion Criteria

Do NOT use O31.12 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

76815CPT Code

Ultrasound, fetal, transabdominal, real-time with image documentation

Clinical Scenario

Used for monitoring fetal health in cases of ongoing pregnancy after spontaneous abortion.

Documentation Requirements

Detailed ultrasound reports documenting fetal heart rate and growth.

Specialty Considerations

Maternal-fetal medicine specialists may require additional imaging and follow-up.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including O31.12, which provides better data for tracking outcomes in complex pregnancies.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including O31.12, which provides better data for tracking outcomes in complex pregnancies.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including O31.12, which provides better data for tracking outcomes in complex pregnancies.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What documentation is required for coding O31.12?

Documentation must include details of the spontaneous abortion, gestational age, ongoing pregnancy assessments, and any complications such as TTTS. Clear records of ultrasound findings and maternal health are essential.